New material

Mary Tang mtang at
Wed Nov 2 12:24:41 PST 2005

Hi Taka --

Transene etchant is allowed at wbgeneral for standard etching of gold, so no
special request is needed.  Hexadecanethiol has been used in our lab before,
however, not usually at wbgeneral.  Do you have a procedure that you would
like to use for treating your gold films?  If so, could you please provide
it?  Generally, it seems that hexadecanethiol is added in very small
amounts to a solution of ethanol or other organic solvent.  Then, the
substrate is dipped into the solution for some period of time.  Then, it is
dried and sometimes heated on a hot plate or in a vacuum chamber.  Because
of the organic solvents, this is generally done at a solvent bench, rather
than wbgeneral, which is for acids and bases.

Please do provide a procedure for treating your gold films and we will try
to help you with your setup.


Quoting Takayuki Tsukamoto <ttsukamo at>:

> Hello,
> I am sending this mail to inquire if I can bring in new material,
> hexadecanethiol, into the clean room. I also want to ask if I can use
> gold ethcant, Transene.
> I want to use a wetbench, wbgeneral to etch gold from glass substrates.
> Mask of gold is mono-layer of hexadecanethiol, CAS# 2917-26-2, whose
> MSDS is attached. A solution of thiol smells, but mono-layer of it
> doesn't smell.
> Although I am taking a written test for wbgenral for another process, I
> would like to use the bench for this process either if I could.
> Thank you,
> Taka
> Takayuki Tsukamoto, PhD
> Current address
> ----------------------------------------
> Department of Chemical Engineering
> Stanford University
> Stauffer III
> 381 North South Mall
> Stanford, CA 94305-5025
> Phone: 650-725-3144
> Fax : 650-723-9780
> Permanent address
> ----------------------------------------
> Research Scientist
> Storage Devices and Materials Lab.
> Corporate R&D Center, Toshiba
> 1, Komukai-Toshiba-cho, Saiwai-ku,
> Kawasaki 212-8582 JAPAN
> tel:+81-44-549-2130 fax:+81-44-520-1802

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